parameter-passing

问题 void restartWeb() { try { String[] command = new String[] {"webRestarter.exe" , ">>","webLog.log"}; Runtime.getRuntime().exec(command); } catch (java.io.IOException err) { webServer.logError(err.getMessage()); } } Why doesn't this work? How could I fix it so it does work like I want it to? -- Executes webRestarter.exe with parameters >>webLog.log So it'd spit out something like this: webRestarter.exe>>webLog.log 回答1: You simply can't use pipes in a exec call. Pipes are a functionality of the

问题 I want to write a simple tool that takes an arbitrary number of input files and performs one operation on each of them. The syntax is stupidly simple: mytool operation input1 input2 ... inputN Some of these operations may require an extra argument mytool operation op_argument input1 input2 ... inputN In addition to this I'd like the users to be able to specify whether the operations should be performed in place, and to specify the target directory of the output. mytool -t $TARGET --in-place

问题 Hi and happy new year to everyone, I have some troubles passing passing a "const char" parameter in templates even in the last versión Compiler Nov 2013 CTP of Visual C++! This is the simple code that doesn't work in the latest Visual C++ compiler but yes with "g++" with the option "std=c++x0", #include <stdlib.h> template<char _parameterChar> class A { char varChar; public: A(){ varChar = _parameterChar; } ~A(){} }; int main(int argc, char* argv[]) { const char a_1 = 'a'; const char a_2 =

问题 I'm trying a few different ways to define and pass the local variable to the partial, but it keeps saying it's undefined: in Show file: <% @startups.each do |startup| %> <%= render :partial => "profile/startup" %> <% end %> in partial: <%= simple_form_for [@commentable, @comment], :remote => true do |form| %> <%= form.input :content, label: false, :input_html => { :id => "#{startup.user_id}" } %> <%= form.submit "Submit" %> <% end %> These are the other ways I'm trying to pass the variable,

问题 I'm trying a few different ways to define and pass the local variable to the partial, but it keeps saying it's undefined: in Show file: <% @startups.each do |startup| %> <%= render :partial => "profile/startup" %> <% end %> in partial: <%= simple_form_for [@commentable, @comment], :remote => true do |form| %> <%= form.input :content, label: false, :input_html => { :id => "#{startup.user_id}" } %> <%= form.submit "Submit" %> <% end %> These are the other ways I'm trying to pass the variable,

问题 I'm trying a few different ways to define and pass the local variable to the partial, but it keeps saying it's undefined: in Show file: <% @startups.each do |startup| %> <%= render :partial => "profile/startup" %> <% end %> in partial: <%= simple_form_for [@commentable, @comment], :remote => true do |form| %> <%= form.input :content, label: false, :input_html => { :id => "#{startup.user_id}" } %> <%= form.submit "Submit" %> <% end %> These are the other ways I'm trying to pass the variable,

问题 I have a generic method like below private fun <T> getSomething(): T { return "something" as T } How can I call this method with a variable T type? val types = arrayListOf<Type>(String::class.java, Boolean::class.java) types.forEach { type -> val something = getSomething<type>() // Unresolved reference: type } At runtime, I don't know what would be generic type T . I am getting the type from types and should pass it with generic getSomething method. Use case I want to call database which has

问题 First of all to explain what I'm trying to do: void Foo(int &num, bool condition); Foo(x, x > 3); This code basically would evaluate the bool of the condition before calling the function and then pass pure true or false. I'm looking for a way to make it pass the condition itself, so I could do something like this: void Foo(int &num, bool condition) { while(!condition) { num = std::rand(); } } I know there could be a workaround by passing a string containing the condition and parsing the

问题 First of all to explain what I'm trying to do: void Foo(int &num, bool condition); Foo(x, x > 3); This code basically would evaluate the bool of the condition before calling the function and then pass pure true or false. I'm looking for a way to make it pass the condition itself, so I could do something like this: void Foo(int &num, bool condition) { while(!condition) { num = std::rand(); } } I know there could be a workaround by passing a string containing the condition and parsing the

问题 I have a dynamic amount of arrays in a specific array. Let's call this specific array: FatherArray This FatherArray has a dynamic amount of arrays in it, right now for example: Child1Array , Child2Array . Next time it gets called it could have more or less than those 2 Child(number)Arrays. So I want to use the function array_intersect() with the arrays (children) of FatherArray as parameters, so like array_intersect(Child1Array,Child2Array). I don't have a clue how i could do this dynamically